Malicious PDF — malware analysis report

Static analysis result for SHA-256 62960e709d52504a…

MALICIOUS

PDF

91.6 KB Created: 2021-07-23 03:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ae44266457df08e9b37c87af53e2e7dd SHA-1: 64002ab49c3125d386051e36f6d4bdbfeda53895 SHA-256: 62960e709d52504aec178ba94744829a0bfe47af8f84598548856ef67fd2e9a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an attempt to obscure the final destination and potentially engage in SEO manipulation for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sbnjl.com/userfiles/files/77209307272.pdf In PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/lamakofu.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/11649929224.pdfIn PDF document text
    • https://kamarkosong.com/contents//files/jerazasidoxokeredu.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/16521675597.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160994cda6b706---merisiruvewatumupijawuxul.pdfIn PDF document text
    • http://antifftech.com/uploadfile/file///2021052921121652.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/26741315008.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/eb5094ed41ce9c954065a84c29fba594/2867553923.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f77f6c44eff4e12e138f6929c0e4bbbd/43245157497.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/zujujugenorumezumito.pdfIn PDF document text
    • https://hotel-la-licorne.fr/userfiles/file/58517702092.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608448bc8ba9a---jedijevuzi.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607163079be84---wozokezenudibe.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/21f8cf7f37d425773831ab7b292438e9/59649727973.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/sesupividosusigaloge.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/nhnbrpohse7qs02ntg7tr64j45/zoborunuvusebovugasunuke.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/25341688551.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ace19264b56---68012883028.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077ffc87fdc6---zovisudefugafurad.pdfIn PDF document text
    • https://www.makathastaliklari.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5396b6302---bafidominorinefasufafed.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/f500a6a2278f3af090477b8c2043f6b9/sitikurena.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/snua6umluplj3c94iuggieh45u/32059974812.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608380fe8fde2---98171937640.pdfIn PDF document text
    • https://tsydesign.com/userfiles/jws/files/rimufurixibamofil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=city+of+glass+online+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11954 17472 bytes
SHA-256: 2c415a3c381599ee455c12ec2ff5a7260910f7655a3a5b54b7da2aa0ae618546
font_02_sfnt_off00014737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14737 10720 bytes
SHA-256: 730577170a22194307989d59ac38efe9c3253b08bc7a601716a3a537e8331f5f

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